Vanadium Sesquioxide/Nitride Nanostructures in Electrospun Carbon Fibers for High Energy Density Supercapacitors

Tian, Yafen; Abbas, Muhammad; Haque, Syed Fahad Bin; Tian, Siyu; Zhu, Xiangyu; Xiong, Guoping; Ferraris, John P.; Balkus, Kenneth J.

doi:10.1021/acsanm.3c03487

Cited by 5 publications

(3 citation statements)

References 52 publications

(82 reference statements)

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“…Electrochemical impedance spectroscopy (EIS), as illustrated in Figure 10 d as a Nyquist plot, encompasses a frequency spectrum ranging from 100 kHz to 0.01 Hz, with a specific focus on the high−frequency domain and an equivalent circuit model, as highlighted in the inset. The intersection point of the EIS spectra with the X−axis signifies the electrolyte resistance, denoted as R s , while the semicircle in the immediately lower frequency represents the charge transfer resistance of pseudocapacitance, denoted as R ct in the equivalent circuit model [ 62 ]. In the instance of MM12, the R s was 1.044 Ω, and the cell did not display a discernible high−frequency semicircle, as the R ct was 3.5 Ω.…”

Section: Resultsmentioning

confidence: 99%

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

Haque,

Balkus,

Ferraris

2024

Materials

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This study explores a simple method of fabricating hybrid supercapacitor electrodes, which could potentially broaden the application of this technology. The method involves electrospinning a uniform solution of Matrimid/Metal−Organic Polyhedra 18 (MOP−18) followed by carbonization at a relatively low temperature of 700 °C in air, rather than in an inert atmosphere, to create free−standing, redox−active hybrid supercapacitor electrodes. Additionally, the synthesis procedure requires no stabilization or activation steps, which enhances the cost effectiveness of the synthesized electrode materials. The resulting C/CuO composite was used as the working electrode, with a polyacrylonitrile (PAN)/Poly(methyl methacrylate) (PMMA) carbon nanofiber (CNF) electrode as the counter and 6 M KOH as the electrolyte in a T−cell configuration. The cell performance and redox activity were evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), electrochemical impedance spectroscopy (EIS) and cycling stability tests. Additionally, the physical and chemical structures of the electrode materials were assessed using X−ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron spectroscopy (TEM), X−ray diffractometry (PXRD), surface area analysis and other characterization techniques. The electrode material demonstrated a specific capacitance of up to 206 F/g. Supercapacitors utilizing this material display an energy density of 10.3 Wh/kg (active material) at a current density of 1 A/g in electrochemical testing.

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Section: Resultsmentioning

confidence: 99%

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

Haque,

Balkus,

Ferraris

2024

Materials

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“…16,[19][20][21][22] Hybrid supercapacitors have the potential to bring a well-balanced synergistic combination of both EDLC and pseudocapacitors to simultaneously afford superior energy density, power density, and cyclability. [23][24][25][26][27][28][29] Hybrid supercapacitor electrodes generally consist of a composite/physical mixture of carbon-based EDLC components along with a metal/metal oxide or conducting polymer pseudocapacitive component. [30][31][32][33][34][35] The EDLC part of the electrode mainly contributes conductivity and power density while pseudocapacitive materials add energy density.…”

Section: Introductionmentioning

confidence: 99%

“…Hybrid supercapacitor electrodes generally consist of a composite/physical mixture of carbon-based EDLC components along with a metal/metal oxide or conducting polymer pseudocapacitive component. 30–35 The EDLC part of the electrode mainly contributes conductivity and power density while pseudocapacitive materials add energy density. 4 Combining EDLCs and PCs in a way that enhances the other is the major challenge in designing hybrid supercapacitor electrodes.…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber composite electrodes derived from metal organic polyhedra-18 and matrimid for hybrid supercapacitors

Haque,

Tian,

Tague

et al. 2024

Energy Adv.

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Concomitant Mitigation of VO₆ Octahedron Distortion and Band Broadening in V₂O₃ for High‐Performing Flexible Supercapacitors

Xu,

Zhong,

Zhang

et al. 2024

Adv Funct Materials

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Vanadium trioxide (V2O3) has emerged as one of the promising candidates for fiber‐shaped supercapacitors. However, irreversible redox behavior during prolonged cycling process has been commonly reported due to the intrinsically distorted VO6 octahedron in V2O3, which inevitably compromises its electrochemical capacitance. Herein, a strategy to simultaneously mitigate the distortion in VO6 octahedron and optimization of electronic structure in V2O3 is proposed by studying a Mo‐doped V2O3 modified stainless steel wire (Mo‐V2O3@SSW). The introduction of Mo dopants effectively tunes the V–O local environment, resulting in a substantial alleviation of the distortion in VO6 octahedron. The as‐prepared Mo‐V2O3 with a more regular VO6 octahedron exhibits highly reversible redox behavior, with negligible structural change after 10 000 cycles. Moreover, it is found that doping Mo into V2O3 leads to V 3d band broadening, which generates more electronic states around Fermi level, thereby significantly accelerating the electron transfer during redox processes. Consequently, Mo‐V2O3@SSW attains a capacitance of 774.4 mF cm−2 at 0.4 mA cm−2, with a capacitance retention of 85.49% after 10 000 cycles. And the integration of Mo‐V2O3@SSW supercapacitors, further showcases its strong applicability in wearable technologies. The comprehensive understanding of the structural–activity/stability relationship in this study offers a novel paradigm for developing flexible high‐performing supercapacitors.

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Vanadium Sesquioxide/Nitride Nanostructures in Electrospun Carbon Fibers for High Energy Density Supercapacitors

Cited by 5 publications

References 52 publications

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

Carbon fiber composite electrodes derived from metal organic polyhedra-18 and matrimid for hybrid supercapacitors

Concomitant Mitigation of VO₆ Octahedron Distortion and Band Broadening in V₂O₃ for High‐Performing Flexible Supercapacitors

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Vanadium Sesquioxide/Nitride Nanostructures in Electrospun Carbon Fibers for High Energy Density Supercapacitors

Cited by 5 publications

References 52 publications

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

Carbon fiber composite electrodes derived from metal organic polyhedra-18 and matrimid for hybrid supercapacitors

Concomitant Mitigation of VO6 Octahedron Distortion and Band Broadening in V2O3 for High‐Performing Flexible Supercapacitors

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Product

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Concomitant Mitigation of VO₆ Octahedron Distortion and Band Broadening in V₂O₃ for High‐Performing Flexible Supercapacitors